Product dispensing machine



Nov. 24, 1953 E. H. THOMPSON 2,660,351

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PRODUCT DISPENSING MACHINE Filed March 51; 1951 15 Sheets-Sheet l4 affix/ Nov. 24, 1953 E. H. THOMPSON 2,660,351

PRODUCT DISPENSING MACHINE Filed March 31, 1951 15 Sheets-Sheet 15 8: Fe E 1 E 8e m a: m a,

Patented Nov. 24, 1953 UNITED STATES" ICE 12,660,351 J PRODUCT" DISPENSING 3 E7 .Ernest HzThompson, Glenview, Ill.

Appllcation March '31, 1951; Serial No. 2l,=666

This invention relates in general to a dispena ing machine and in particular to onewhich' dispenses a product in powdered, granular or similar form directly into a cup and thereaften'discharges water into the cup for dissolving the product therein to produce a beverage.

One object of the invention is to provide a dispensing machine particularly adapted for dispensing hot drinks such as coffee, tea,- cocoa or the like or powdered soups or bouillon in a convenient manner requiring a minimum of manual manipulation.

Another object is to provide a drink dispensing machine adaptable for either semi-automatic or fully automatic operation which a plurality of 'difierent products'are contained in'a magazine and can be selectively dispensed therefromand mixed 'with hot water, the magazines'beingconstructed with efiective' sealing meansi against the entrance ofmoisture or other contamination" to the products therein. I,

Still another object is 'to-provide a'product :clispensing machine which maybe made as simple or as complex as desired, such as a semi-automatic machine in which a considerable number of the operations are manually performed, a fully automatic machine in which all the'operations except initiating a cycle of operation are automatically performed i or various A intermediate semi-automatic machines in which moreior less of the operations are manually performed.

Asfurther object is to :provide a product dispen'sing machine including a magazine comprising a number of magazine tubes in which a plurality of different productstmay be stored and from which they may be selectively dispensed, the magazine tubes l bein indexed either manually or by automatic means .tca cup-receiving position and each magazineptube including. -a.charge forming unit operable under manual or automatic control to-dischargea charge of the product from the selected magazine tube, means being provided for thereafter discharginga hot water under pressure into the cup, or a mixture of hot and cold water to provide a drink of the. correct temperature.

Still a further object is to provide: a drink dispensing machine-for hot drinks including a hot water tank in which the-temperature is thermostatically. controlled and from which the flow of water to the cup may be -controlled by azsolenoid valve admitting water .to. the tank, .the solenoid valve being under control of a'push button in the semi-automatic machine. and automatically controlled by a sequence: switching arrangement in the fully automatic machine.

vAnv additionalobject is to provide .a readily removable magazine for either the semi or..fully automatic machine having a plurality of magazine tubes which maybe. readilyrefilledrby .a

servicing attendan't' in. 'ina 1 minimum of *itime, 'the magazine including a convenient mannertand individual 'magazinetubes therein and each having a charge forming unit of the character more specifically described and'claimed in my copend- "ingapplication, Serial No. 150,897, filed M'ar'ch Another additional object is to providein the fully automtaic-dispensing machine a paper-cup dispenser, a magazine-indexing mechanism,- an

operating mechanism for whichever charge forming unit is brought to the cup receiving station (also used in thesemi-automatic machine),

and a water discharge valve operated by a solenoid,"all ofwhich elements' are operable 'in the sequence just namedgthe sequencebeing initiated by the depression of a selected push button, a number'of whichare'provided for the-various products contained in the magazine and for various combinations and quantities or some'of "the products. g

Still anotheradditional object-is to provide a switching arrangement including relays and-solenoi'ds together with-motor driven cams for insuring proper sequential operation of the various mechanisms *offthe fully automatic dispensing machine, and to provide for interlocking the various switches in such'manner that additional push buttons cannot be used to cause a misoperation of "the machine while'it is operating 'in 'one ing one; two or three spoons of sugar therein and to provide ,for two or threeidifierent products dispensed from the magazinelinto thecup. such as cream and cofiee orcream coifee and sugar.

} Still a. further additional object is to provide an indexable magazine in-which a cam succes- .sivelyiclosesaseries of switches and the switch whichhas. been included in the operating circuit Joya-selected push' button will, when closed, stop the indexing operation and initiate a product dispensing operation for the magazine tubethen at the cup-receiving position, the completionof the operation of the chargeforming unit ofthat magazine "tube-initiating further indexing of the magazine until another switch in the circuit stops thev'magazinamorithe. magazine continues tothe tioned manually as in the semi-automatic machine.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various-parts of my product dispensing machine, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings wherein:

Figures 1 to 8 illustrate my semi-automatic dispensing machine and. Figures 9 to 26 illustrate my fully automatic machine which includes substantially allthe parts of the manual machine and adds to them automatic mechanism for accomplishing operations that are performed manually with the machine illustrated in Figures 1 to 8.

Figure 1 is a front elevation of the semi-automatic machine.

Figure 2 is an enlarged horizontal sectional view on the line 22 of Figure 1.

Figure 3 is an enlarged sectional view on the line 33 of Figure 2 to show the water discharge nozzles.

Figure 4 is an enlarged vertical sectional view on the line 4-4 of Figure 1.

Figure 5 isa plan view of the machine with the magazine removed and a portion of the supporting wall therebelow broken away to show details of construction.

Figure 6 is a vertical sectional view on the line 6-6 of Figure 5 showing particularly a motor and the means whereby it operates a charge forming unit.

Figure 7 is a horizontal sectionalview on the line 1- of Figure 4 showing particularly the hot water tank in the base of the machine.

Figure 8 is a wiring diagram for the'motor shown in Figure 6, for the heating element of the tank shown in Figure 7, and for a solenoid valve for controlling the flow of waterthereto.

Figure 9 is a front elevation of the fully automatic machine, the scale being somewhat smaller than that shown in Figure 1, an enclosing housing for the mechanism being omitted- Figure 10 is an enlarged plan view of Figure 9 with parts broken away and other parts shown in section to illustrate details of construction.

Figure 11 is an enlarged horizontal sectional View on the line I ll l of Figure 9 showing various motors used for operating the mechanism of the fully automatic machine, a portion of the cup dispenser, and the solenoid valve arrangement for controlling the water for the drinks dispensed from the machine.

Figure 12 is an enlarged vertical sectional view on the line l2l2 of Figure 9 and shows the lower ends of two opposite magazine tubes together with the operating mechanism for the charge forming units of the machine. I

Figure 13 is a plan view of a ring gear and associated switches and of a water discharge valve, the magazine above the ring gear and switches anda catch plate that normally covers the ring gear and switches being removed.

Figure 14 is an enlarged plan view of a portion shows means for locking the magazine to the ring gear.

Figure 15 is an enlarged side elevation looking at the left side of Figure 9 and shows particularly a repeater mechanism for certain of the charge forming units.

Figure 16 is an enlarged front elevation showing particularly the indexing ring gear, the mechanism therebelow which is illustrated in plan view in Figure 11, and a solenoid for operating the water "discharge valve.

Figure 1'? is an enlarged vertical sectional view on the line l'|--l'l of Figure 10 illustrating details of the water discharge valve.

Figure 18 is a vertical sectional view on the line l8-|8 of Figure 17 showing the connection of the indexing motor with the ring gear.

Figure 19 is a vertical sectional view on the line Iii-l9 of Figure 11 showing details of the cup dispenser.

Figure 20 is an enlarged vertical sectional view on the line 2020 of Figure 10 showing an operating cam for the cup dispenser.

Figures 21 and 22 are vertical sectional views on the line 2l2l and 2222 respectively of Figure 10 showing cam-operated switches of the cup dispenser.

Figure 23 is an elevation of a plurality of cups in the dispenser at the indicating line 23-43 of FigurelO and showing an empty-cup-dispenser switchin the position it is caused to assume by reason of cups being present in the cup dispenser.

Figure 24 is an enlarged vertical sectional view on the line 2424 of Figure 9 showing the operation of the selector push buttons.

Figure 25 is an elevation of Figure 24 looking at it from the right.

Figure 26 is an enlarged sectional view on the line 26-46 of Figure 9 showing the coin control initiating mechanism of the machine.

Figure 27 is an elevation thereof looking at Figure 26 from the left; and

Figure 28 is a wiring diagram for the fullyautomatic machine.

Description of semi-automatic dispensing machine Describing first the .semir-automatic machine disclosed in Figures 1 to 8, a base isprovlded consisting of a base jacket 30 in which a water heating tank 31 is mounted. The tank 3| is imbedded in heat insulating material 32 interposed between the outer wall of the tank and a tank jacket 33. The tank jacket in turn is supported with respect to the base jacket 39 as by means of lugs 34 and 35 on the jackets 39 and 33 respectively and connected together by bolts 36 as shown in Figures 5 and '7.v

Referring to Figure 4, an electric heating element 31 surrounds the lower portion of the water tank 3! for heating the water therein. The heating element is thermostatically controlled by means of a thermostat 38 shown in Figure 7, the wiring diagram therefor being shown in Figure 8. The heating element and the thermostat are in series with each other across the line indicated as Li and L2, the usual 110 volt lighting current being suitable for the purpose.

Water is supplied to the tank 3| from a supply pipe 39 as shown in Figure 4, the pipe being connected with a water discharge valve S09 of solenoid type, the valve thereof being designated 40. A second pipe 4! is connected with the valve 40 attac dd hareesxinto the =bottom -.oi:tl1.e tank... A perforated baiiie plate-421s providedinthe-tank 31 for effecting'a more even absorption of heat from the heatingelement 3'! throughout the body of water in the tank.

Referring particularly .to Figure, 4, thebase jacket 30 has 'a horizontal. supporting Wall .43 therein'which divides the base. into ashallow top compartment and a relatively deep lower compartment in which thezwater. tank 3| is mounted.

.A .second supporting plate 44 is mounted, below the plate 43 and supported with respect thereto byqscrews H2 entering .fourbosses l-ililof the wall 43ers shown in Figures 5 and 6. .A central supporting pin l5has its .shoulderedlower end riveted thereto. The pin extends upwardly through the supporting wall 53, a oeshaped washer 46 being providedmounted in a groove .of the pin 45 for supporting the wall 45in relation to the somewhat heavier supporting plate 44.

.Will now be described.

seats 5| for magazine tubes 52 which are removably associated with the base plate. One of. the seats 5| can be seen in detail at the right side of Figure 2 where the adjacent magazine tube 52 has been broken away. The tubes are held in position with respect to the plate 5'1 by means of. hooks 53 entering slots 54 of the plate.

In Figure 2 it will be noted that there are eight of the magazine tubes 52. These may contain powdered orgranular products such as (reading clockwiseand beginning at the lower left magazine tube) cocoa, chicken bouillon, beef bouillon,

vegetable bouillon, tea, coffee, cream and sugar. Any suitable products, of course; may be' dispensed from the machine and the list just given .is only for the purpose of illustration and to aid in describing'the operation ofthe machine later on in the specification. For convenience in such description, the ingredients have beenlabe'led on the dispensing tubes 52in Figure 2.

Themagazine tubes 52 are covered'by a removable sheet metal casing 55 (omitted from Figure 4) which closely surrounds the tubes as in Figure 2. and is normally secured in position by wing screw 55, slots 51 in'the lower end of the casing 55 being provided to pass down over the wing screws as the casing is inserted in position. "The casing ends with flanges 58 which are spaced from each other as shown in Figure 2 and the gap is closed by a cover plate 65 held normally in position by leaf spring catches 62. This cover may have the price list of the various beverages thereon as partially illustrated in Figure l and isremovable for the purpose of providing a vertical slot between the flanges .58 through which the servicing attendant may thrust his arm'for grasping the central tube 39 for the purpose of lifting the entire magazine as a 'unit off the supporting pin 45 when servicing the machine.

The magazine tubes 52, are tiedtogether at the top .-:by; meander atop:- plate. flu v similat-rtezthe base plate 4.7- butzinverted relative; thereto;:.:,as

more fully disclosed in my copending application.

This plate 'for the semi-automatic-machine-sis not shown but it does appear in Figure-9 directed :to the fully-automatic. machine.

:sucht .slotswhereby. the tubes are; .:supported in theseats 5! of both the base :plate145l andfithe :top plate 41a by the fingers A .cover-63is-p1'ovided and consists of a flangeddisc with ais'uit- .a'ble gasket therein tocontact the open upper ends offall the magazine tubes 52; the; contact beingassured by means. of a removable: Wing nut 6d all as fullydescribed in said copending'application. In this way, the wingznut can be removed als 65 to 81 in which iiiis the; bottom of a channel-shaped. support .(see- Figure 54). "The support. 85 includes a: substantially rectangular discharge spout 55 having a top; element L67 engaged againstthe lower end of the oute'r ed'ge of the tube 52.

The charge forming i units areremovably secured in. the lower ends of the magazine tubes 52..as disclosed in my copending applicationand the charge forming unit includes: a sleeve-'68 forming ashoulder in the magazine tube, which shoulder maybe somewhat enlarged by means of a wire ring .69 solderedto the inside of the-sleeve.

Each charge forming unit includes a charge forming slide which is channel-shaped; its" web being shown at it. A D shaped flanged opening 1 l' is provided in'the chargeforming slide 70," the .flange extending upwardly asillustrated. r

The web 75 (Figure tandalso Figure 12showing the parts enlarged) extends inwardly toward the center of the magazine and has a'slide plate 12 secured to its bottom surface by a stud -13 and av roller stud l4. A-roller 15is 'journa-lled on Fthe. stud M andboth studs are ret'ainedin assembled position'onx-the web iii and the-slide .pl'ate'llby suitable nuts as illustrated. Thestud's :13 and. 'Mhave shouldered portions slidable in a slot it of the channel-shaped supwire'ring 69. The bead 18 is slightly larger than the internal diameter of the magazine tube '52 to provide a seal between the spout and the tube.

- The dischargespout 71 is-made of thin rubber,

neoprene, or similar material, and its lower end is held in sealed relationship with the flanged opening H: by a clamp-bandit, the clamp-bolt therefor being shown at 80. Within the flanged opening H, a charge sizing element 8! is located and this may also be made of rubber, neoprene or the like, the sizing element being thus readily removable from the flanged opening so that one of a different size or wall thickness can be inserted for dispensing a larger or smaller charge of product in an obvious manner.

A flap valve 82 is provided for the lower end of the flanged opening H and it is faced with a combination gasket and hinge element 83, the radially inner margin of which is secured to the bottom of the slide plate 12 as by cement. The radially inner end of the iiap valve 32 terminates in a depending actuating flange 84 adapted to travel in a slot 85 shown at the left side of Figure 12, this slot being in the web of the channel shaped support 85. This arrangement provides for causing a relatively quick and automatic opening of the flap valve 32 as will hereinafter appear.

An abutment roller 85 is mounted across the charge forming unit to seal it on from the ma azine tube 53 at the time the product is discharged from the charge forming unit. The supporting wall as serves as a catch plate for any of the product that might leak from the charge forming units and is readily accessible to the servicing attendant whenever the magazine unit is removed from the supporting pin 35 for cleaning out such product.

The wall is interrupted adjacent the front of the machine which is the right side in Figure 4 by a semi-circular depression 81 (see also Figure '7) adapted to receive a beverage cup 88. A rod 89 bent C-shape serves as a stop for the cup in proper position to receive charges of product from the various magazine tubes. This rod is supported on a cup supporting plate 99 which forms the top of a removable container 92 fitted in the depression 8?, the cup supporting plate being perforated so that any spillage may pass through the perforations into the container 92 which may be periodically emptied.

The cup 38 when in position is also adapted to receive water from water discharge nozzles 93 of a water delivery pipe 94. This pipe as shown in Figure 4 leads out of the top of the water tank 3| and the exposed portion thereof may be covered as with neoprene or the like 95.

The magazine unit is adapted to be manually rotated and for this purpose handles 96 are provided thereon. Adjacent each handle the product corresponding thereto may be indicated as shown in Figure 1. Each magazine tube from which a product is desired is rotated to the cup receiving position with its charge forming unit aligned with the cup 88 and thereafter the cover plate 68 is centered relative thereto as in Figure 2 after the various powders have been dispensed into the cup and the cup is ready to receive the water from-the nozzles 93.

The charge forming units of the magazine tubes are adapted to be operated by mechanism which will now be described; a slide 9? (see Figures 4 and has a pair of slotsea and 99 therein. The slot 98 surrounds the center pin 45 and the slide 9'. is retained against the supportingplate 44 by a C-shaped washer 9! in a groove of the pin. An actuating shaft lac passes through the slot 89. The slide 9'! has an actuating flange HH located in such position as shown in the right half of Figure 4, that the magazine unit when indexed will bring a stud i3 immediately back of it and a roller '15 immediately in front of it. p

It will then be obvious that when the slide 91 is propelled toward the right in Figure 4, it will move the slide plate i2 also toward the right, the flange it! traveling in a slot I02 of the supporting wall 52 (see also Figure 5) until it engages a bumper 193 of rubber or the like. During this motion, the roller 15 passes between a pair of guide rollers I64 which properly line up the magazine unit in the event it is slightly out of line. If it is too much out of line, the flange IIH will either miss the roller 15 or engage it so far cit-center that it will swing it out of the way after which the magazine can be properly aligned manually and the desired charge of product dispensed by another operation of the slide 97 and the slide plate 12.

For actuating the slide El, the shaft 1% is provided with a cam I cooperable with rollers I08 and lil'i on the slide, and a spring 108 has one end attached to the supporting plate 44 as shown in Figure 5 and its other end attached to a perforated ear its on the slide. This tends to move the slide toward the right in Figure 4 (downwardly in Figure 5). The cam M5 is so shaped that upon slight rotation clockwise from its position shown in Figure 5, the roller 185 will engage a sudden drop of the cam so that the slide 9'! is propelled forwardly rather rapidly by the spring 188 and is stopped in its forward motion by the bumper H33. Soon after the slide strikes the bumper, it is retracted by the rise on the cam Hi5 as the shaft its; continues to rotate in a clockwise direction and finally stops again at the position shown in Figure 5 at the end of a cycle of dispensing operation.

Referring to Figure 6, the shaft IDS is driven by bevel gears see and H0, the bevel gear l [D in turn being driven from a product dispensing motor M3. The rotation of the motor is transmted through suitable step-down gearing in a gear casing i i l in a well known manner.

Referring to the circuit diagram in Figure 8, the motor M3 is energized from the line wires Li and L2 by a product dispensing push button PH.

A dispensing slide switch SI 5 of the full stroke" typeshunts the push button PI! and is normally open which position is illustrated in Figure 5. It is held in this open position by a pin il i on the slide 9? so that when the push button PI? is depressed momentarily, it will start the motor M3 so that the cam [65 will rotate suiiiciently for the spring 168 to propel the slide 91 downwardly in Figure 5 and as soon as it starts this movement the switch Slfi closes to keep the motor M3 energized until the pin H4 returns to the position illustrated even though the operator removes his finger from the push button PH. This insures a full stroke or cycle of operation of the slide 9! to complete a dispensing operation for a charge of product from the magazine tube selected.

A water dispensing push button PIE is provided for the coil of the water discharge solenoid valve 80?. The coil is normally de-energized and may be energized from the line wires Li and L2 by depressing the push button P18.

Practical operation of the semi-automatic machine shown in Figures 1 to 8 r This machine is particularly adapted for soda fountains-and the like to be operated by the clerk or to dispense free drinks to employees and the like. Regular china or plastic cups may be used, or if desired paper cups may be used. The cup 88 is first positioned on the cup supporting plate asshown in Figure 4 against the C- pressed and-held depressed until two chargesof' sugar have been dispensed into the cupsand the slide 91- starts'to dispense the third charge. The push button may-then bereleasedand after-the third chargeof sugar has been dispensed,' the slide will stop in the normal position of Figure :5.

The coffee knob SB may then be brought to position'over the cup and the buttonxPII depressed for a single coiTee dispensingroperation'; Likewise thecream may-be dispensed, either a single charge or two charges if desired 'by holding the push button PI'I depressed longienough for the second cycle to start;

The magazine may then be rotated to the normalposition shown in Figure Z'so that-the magazine tubes and their charge forming units are away from the cup 88- to minimize vapor'rising from the cup and acting upon the productin any charge forming unit that may otherwise be left' in position overthe cup 882' The water dispensing button PI8 may then=be depressed and will open the solenoid valve So9-40 to admit water to the-bottom of the tank 3|, which displaces hot water from thetop thereof and discharges it from the water discharge nozzles 93. When the cup 'is' nearly-as full as desired, the push button PI'Bmay be released for de-energizing the solenoid So!!- whichcauses'the valve-40 to reclose and thepressure-in' the-pipes M and 94' and in'tbe tank-3| will reduce to atmospheric. This arrangement permits-compensation for contraction and expansion inthe tank and piping with any excessexpansion merely discharging a few drops of water fromthenozzles- 93jwhich pass through the-perforations of the cup-vsupportingplate 90 and are deposited-in the container 92.

Description of fully.-datum-cube:dispc'rwing;v machine The. automatic machine shown in Figures 9"to 28 uses the same magazine unit that is described inconnection with the semi-automatic machine.

The casing 55 andthe cover'60 of Figured are.

not used and in Figure 9,'I illustrate the fully.- automatic machine without a suitable .cover that would be preferably, provided for the magazine. Since the magazine unit is'the same as described particularly in connection with 'Figuresz and 4 and :as disclosed in my copending'applications, Iwill make no further reference to its details of construction except wherein an additional element is provided in the form of'aconnecting means between the magazine and a ring gear '1 I 1.

This connecting means consists of a connecting hook I I5 adapted to engagea pin II'6 projecting upwardly from the ring gear I IT (see Figures-';

The'hook is carried by a rock 13, 14 and 16). shaft II'8 which is normally rocked counterclockwise in Figures 10 and- 14 by a Spring I I9.

A lever rod I2!) is provided tounlock the hook from the pin when desired. The rock shaft is relatively short and journalled-in the magazine base plate 41'.

In-tl'ie fully-automatic. machine in 'placeof the 1-0 central supporting-$111545? forvthe==magaziney a similar supporting pin 'I2I is provided (see Fig--v ure=l2) whichis riveted in'a supporting plate I22. The platev I22'1s supported'byposts I 23: extending upwardly" from a platform 124*. The platform in tu'rn is'supportedon a postelike base I25 which housesasuita ble water tankprovided with an electric heater which'is thermostatically controlled and which-tank isalso numbered'3l in Figure ll. The shape of the tankis somewhat modified when compared :With the one shown in Figures 4 and -'7 but operates essentially :in the same manner and accordingly will not be described indetailfits-clrcuit being the same as disclosed in Figure 8 and including a similar thermo'-- stat. The thermostatfor both the semiand fully-automatic machines may be adjustable for supplying water of a predetermined temperature and the circuit for the fully-automatic machine is shown-diagrammatically-in Figure 28.

Returning to Figure 12, thrustbearing 59 takes theweight of the magazine unit. The slide 91 of Figure 5 has also been somewhat modified for the fully automatic machine and a comparable slide I26 is shown perhaps best in Figure 12. It has a slot I21 guided on a roller I28 and an extension I 29 guided in a slotof an angle bracket I30 secured to the supporting plate --I22. The actuating flange for the 'roller "I5 and-the stud I3 comparable to the flange I 0| in-Figure 4 is shown at I 3| in Figure'12'and-the plate I22 is slotted at I32 for the slide'I26. The actuating spring I 08 is'provided in the fully-automatic machine the same' as in the semi-automatic machine.

Also the motor M3 is shown-inFigure 12 for fianges I35. to supportand'position a paper cup I36; Below the supportingplate'lfl a deflector plate I31 is provided and it. has a flanged opening I 38" over a funnel I39 whichhas aspout I 40 extending through the. platform I44 and entering the top of the container I33.

The cup supporting plate I34 has depending therefrom a pair of posts I4I whichare removably secured to the platform I24 b wing screws I44 so that the entire assembly of the cup supporting plate I34 .(whichis removable from the deflector plate I31), side cupguards I42 .and a topcup guard I45 are removable. asa unitary as.-. sembly. The guard. I45 is provided with an-opening I46 through which the selectedproduct from the magazine-unit is. discharged, the. discharge spout 65' beingloeateddirectly over this opening in the indexed positionv of. the magazine unit.

In the fully-automatic machine, the water is also adapted to be discharged through this opening from nozzles I41 (see Figure 17) of a water discharge valve body I48. This valve body is supported by clamp brackets I49 on a channelshaped support I50'mounted behind the cup guard I45. A valve stem I51 passes through a packing I58 and into-the valve body I48 and ter- 

